Dental plugger



`(No Model.)

J. F. CLEMENTl` DENTAL PLUGGER. No. 312,818.

HWI. III

Unire rares .artnr trice.

JOHN F. CLEMENT, OF PHILADELPHIA, PENNSYLVANIA.

DENTAL PLUGGER.

SPECIFICATION forming part of Letters Patent No. 312,818, dated February 24, 1885.

(No model.)

T0 all whom, it may concern:

Be itknown that I, JOHN F. CLEMENT, a citizen of the United States, and a resident of Philadelphia, Pennsylvania, have invented certain Improvements in Dental Pluggers, of which the following is a specification.

The object of my invention is to so construct a dental plugger as to provide for the delivery of the blow in either direction, to regulate the force of such blow, or to throw the instrument out of action without stopping the rotation of the driving-spindle.

In the accompanying drawings, Figure l is a side view of my improved dental plugger;

Fig. 2, a longitudinal section of Fig. 1, drawn,

to an enlarged scale; Fig. 3, a detached perspective view of part of the device; Fig. 4, a transverse section on the line l 2, Fig. 2; Fig. 5, a transverse section on the line 3 et, Fig. 2; Fig. 6, a transverse section on the line 5 6, Fig. 2; Fig. 7, a transverse section on thcline 7 8, Fig. 2; Fig. 8, a transverse section on the line 9 l0, Fig. 2; Fig. 9, a detached section of part of the device; and Figs. l0, ll, l2, views illustrating modifications.

A is the hand-piece casing, provided at the upper end with a screw-eap, a, and at thelower end with a screw-cap, b.

Turning in but confined to the upper cap, a, is a driving-spindle, B, which is connected with the drivng-shaft by any suitable form of ilexible power-conveyer, so as not to interfere with the free manipulation ofthe handpiece.

In the upper portion of the handpiece ris,

guided a tubular hammer, D, yin which is a recess, d, the opposite ends of this recess forniing or being provided with cams fand g, facing in opposite directions. Thelower portion of the hammer D is recessed for the reception of a disk, h, secured to the upper end of the spindle F, which is guided in the tubular hammer D, and has at the lower end the usual plugging-tool, w.

A sleeve, G, is connected by means of a coiled spring, H, to the lower end of the hammer, and from this sleeve project arms I I, which are adapted to slots i in an extension of the lower cap, b, of the hand-piece,'and are connected at their lower ends to a ring, J. The action of the spring H upon the hammer which rotates within the recess d of the ham- L mer.

When the ring J is depressed, it carries the sleeve G with it, and this. owing to the spring` connection between the sleeve and hammer, has a tendency to draw said hammer downward, Ythe pin m being thus caused to act upon the upper cam, g, so as to elevate the hammer and stretch or impart tension to the spring H. lVhen the hammer is released from the control of the cam, it will be depressed by the spring and will strike a downward blow on the upper side ofthe head 7L of the plugger spindle; but if the ring J is elevated it will likewise elevate the hammer and bring the cam f under the induence of the pin m, so that the hammer will be depressed and the spring H will be compressed until the hammer is released from the control of the pin, whereupon it will be thrown upward by the spring, and will deliver an upward blow against the under side of the head 7i.

lVhen the ring J is in the mid-position shown in Fig. 2, the hammer is so supported that the pin m rotates in the central portion of the recess d, and fails to exercise anyinfluence upon the said hammer.

The force of the blow` delivered depends upon the amount of tension or compression of the spring H, and this depends upon the extent to which the ring J has been moved in either direction from the mid-position, and as the ring J can be readily moved by the forenger of the hand in which the instrument is held, it will be seen that not only can the direction of the blow be readily governed, but the force of the blow as well is under perfect control. The instrument can thus be thrown out of action while the tool is used for picking up gold and adjusting the same in the cavity of the tooth, after which, by a simple movement of the ring J, the tool-spindle may be brought under the influence of the hammer, for the purpose of compacting the gold.

If desired, cams on the drivingfspindle may act upon the lugs on the hammer, as shown in Fig. 10, instead of the reverse arrangement shown in Figs. 2 and 3, and instead of regu- ICO places the instrument under more direct control.

Two springs may be used instead of a single spring, if desired, one spring being above and the other beneath the hammer, the sleeve G in this ease terminating Iin an open frame, which carries the hammer and springs, as shown in Fig. 12.

I claim as my invention- 1. The combination, in a dental plugger, of the hand-pieee, adriving-shaft, atool-spindle, a hammer for acting thereon, reverse cam mechanism for actuating the hammer, aspring- 3. The combination of the hand-piece, the driving-shaft, the tool-spindle, the hammer, reverse cam mechanism for aetuatingsaid ham mer, a supporting-spring, H, for the hammer, and an adjustable spring-carrier having an eX- posed ring, J, at the lower portion ofthe handpieee, as set forth.

4. The combination of the hand-piece, the driving-shaft, having a pin, m, the tool-spindle, the hammer having a recess, d, and cams fand g, the supporting-spring H, and the adjustable spring-'carrier G, as set forth.

5. The combination of the hand-piece, the driving-shaft, the hammer recessed near the end, reverse cam mechanism for actuating the hammer, a hammer-supporting spring, an adj ustable spring carrier, and a tool-spindle passing through the end portion of the hammer, and having a head, h, contained in the recess of said hammer, as set forth.

In testimony whereof I have signed my name to this specification in the presence of two subscribing Witnesses.

JOHN F. CLEMENT.

Vitnesses: y

J oHN M. CLAYTON, HARRY SMITH. 

